> Also although we won't be using it, the entire source code for the human brain has to be strictly less than 700 MB, because the fully sequenced human genome which obviously encodes the full human mind is less than 700 MB uncompressed.

There's also the training set consisting of all sensory and chemical inputs from conception on. I think it's fair to say that the former inputs are only sensible to an organism with the same sensory organs, and the latter inputs are only sensible to an organism with the same physical structure & organs as we have.

I don't think a silicon neural net with the neurons of a human being would be the same thing after two dozen years of training as a human being after 24.

You're also assuming that there's nothing more to a mind than its neurons.